Study on the isolation and antifouling activity of the deep-sea sediment-derived microorganisms
Journal Title: Journal of Fisheries Research - Year 2025, Vol 47, Issue 2
Abstract
BackgroundMarine fouling organisms pose severe problems to aquaculture. However, the metal-based antifoulants pollute marine environment. Thus, environmentally friendly alternatives are urgently needed. Natural antifouling products are important sources of environmentally friendly antifoulants. ObjectiveThe aim of this study is to screen out the deep-sea microbial resources with antifouling activity. MethodsHere the microorganisms from the different sediments of the deep sea were isolated and the antifouling activity of their fermentation broth extracts was tested using the settlement assays with the mussel Mytilopsis sallei juveniles and the bryozoan Bugula neritina larvae. Furthermore, the residual effect of the bacterial extracts on M. sallei juveniles were examined. ResultsThe results showed that 15 microorganisms of 10 genera were isolated from 6 types of the deep-sea sediments. Marinobacter was the dominant bacterial group. The extracts of strains B2 (Alteromonas sp.), C1 (Marinobacter sp.), C2 (Escherichia sp.), E1 (Pseudoalteromonas sp.), E2 (Marinobacter sp.) and F2 (Flagellimonas sp.) inhibited settlement of M. sallei juveniles, and the extracts of the strains B1 (Marinomonas sp.), B2 (Alteromonas sp.), C2 (Escherichia sp.), C3 (Marinobacter sp.) and E2 (Marinobacter sp.) inhibited settlement of B. neritina larvae. The bacterial extracts of strains F2 (Flagellimonas sp.) and fermentation broth extracts of C1 (Marinobacter sp.) and E2 (Marinobacter sp.) showed no residual effect on M. sallei juveniles, indicating their low toxicity. ConclusionEight strains of antifouling bacteria are isolated from deep-sea sediments, among which strains F2, C1, and E2 demonstrate potential in the field of environmentally friendly marine antifouling.
Authors and Affiliations
Pei SU,Yining WANG,Shibao ZHANG,Meng ZHANG,Jianfei QI,Dousha ZHAO,Qiming ZENG,Ranran CAO,Danqing FENG,
Keywords
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- EP ID EP768821
- DOI 10.14012/j.jfr.2024114
- Views 10
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